All living things on Earth are tied back to the same common ancestor from 3,800,000,000 (3.8 billion) years ago, a hypothetical organism referred to as the "Last Universal Common Ancestor". The earliest living creature which can be identified with concrete evidence is the stromatolite. The fracture between dolphins and humans occurred 90,000,000 - 95,000.000 (90 million - 95 million) years ago which was the time period when the dinosaurs were still alive...
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